Boon Luminary Spear / Staff GW2 Luminary WvW Builds
Luminary is the Guardian's newest elite spec, and it fills the same squad slot Firebrand has held for years — boons, healing and defence for the group. The delivery is what differs. Where Firebrand opens a tome, Luminary enters Radiant Forge and equips a radiant weapon. 
Resplendent Weaponry grants boons to nearby allies whenever it does; 
Light's Gift hands them Luminary's Blessing on top; 
Persistent Blessing refreshes that blessing and fires its healing when you leave. Arming a weapon is the support action, and the whole line pays you for cycling.
Its utilities are stances rather than mantras. 
Valorous Stance grants 
Stability and 
Protection to nearby allies, then makes every boon you grant heal the ally you granted it to. 
Resolute Stance heals when you cleanse yourself, then heals and cleanses nearby allies. 
Stalwart Stance breaks 
Stun for the group, hands them 
Aegis and cuts the damage you take. Its virtues change too: 
Radiant Courage breaks Stun and grants Aegis, 
Resistance and Luminary's Blessing at once; 
Radiant Resolve heals and grants 
Light aura.
One build so far: a Minstrel's support on the same Honor and Virtues chassis as the Firebrand support. Same stats, different rhythm.
1 Luminary build
Boon Luminary Spear / Staff Playing Luminary in WvW
Radiant Forge is a shroud you cycle rather than a bar you sit in. 
Enter Radiant Forge recharges faster for each radiant weapon you left unused, so hoarding is punished — the spec wants you in, armed, and out again. 
Radiant Armaments gives you a bonus based on the weapon you equipped and lets it linger for a while after you exit, and 
Illuminating Inspiration pulls your virtue recharge forward each time you arm one. The support traits and the mechanic are the same loop seen twice.
What it asks of you is timing rather than resource management: you are not counting pages, you are deciding when to be inside the forge. That is also where it struggles. If you are mid-cycle when the bomb lands, you are pressing forge skills instead of the button the squad needed. Firebrand's three tomes are the more flexible panic button; Luminary is steadier and less spiky, and it wants a player who reads the push a moment early. 
Purging Light, incidentally, is a trait and not a utility — it cleanses nearby allies when you grant yourself Light aura, and gives you that aura off your healing skill.